WO2006052745A2 - Apparatus and method for suction-assisted wound healing - Google Patents

Apparatus and method for suction-assisted wound healing

Info

Publication number
WO2006052745A2
WO2006052745A2 PCT/US2005/039996 US2005039996W WO2006052745A2 WO 2006052745 A2 WO2006052745 A2 WO 2006052745A2 US 2005039996 W US2005039996 W US 2005039996W WO 2006052745 A2 WO2006052745 A2 WO 2006052745A2
Authority
WO
Grant status
Application
Patent type
Prior art keywords
wound
suction
system
pump
cover
Prior art date
Application number
PCT/US2005/039996
Other languages
French (fr)
Other versions
WO2006052745A3 (en )
Inventor
John R. Boehringer
John Karpowicz
Christopher L. Radl
Kevin P. Klocek
Original Assignee
Boehringer Laboratories, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0001Containers for suction drainage, e.g. rigid containers
    • A61M1/0011Drainage containers incorporating a flexible member creating suction, e.g. bags in a low-pressure chamber, bellows
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • A61M1/0031Suction control
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0066Suction pumps
    • A61M1/0072Membrane pumps, e.g. bulbs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/008Drainage tubes; Aspiration tips
    • A61M1/0088Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0058Suction-irrigation systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/15Detection of leaks
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • A61M2205/3331Pressure; Flow
    • A61M2205/3344Measuring or controlling pressure at the body treatment site

Abstract

A system for treating a wound with suction is provided. The system comprises a wound cover, a pump having an input port and an output port, the input port providing suction to the wound via the wound cover, and a reservoir coupled to the output port of the pump. The reservoir is adapted to receive effluent from the wound and the pump is capable of maintaining a controlled level of suction at the wound.

Description

APPARATUS AND METHOD FOR SUCTION-ASSISTED WOUND HEALING

FIELD OF THE INVENTION

The invention relates to a device and method for treating wounds. More specifically, the present invention relates to a device and method for treating wounds with suction.

BACKGROUND OF THE INVENTION

Suction has long been employed in the management of surgical wounds. Closed suction systems are employed to evacuate the wound space and carry potentially deleterious materials away from the patient and to control swelling. Sucti on has also been employed in the care of open, chronic wounds or hard to heal wounds such as pressure sores.

Basic cellular functions, such as oxygen transport and cellular transduction signaling, are carried out at the capillary level. Chronic wounds such as pressure sores or bed sores are, by definition, a result of poor or impaired circulation and contain ischemic and necrotic tissues. It is desirable to stimulate circulation in the underlying wound tissue through the use of suction.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of conventional systems, a first exemplary embodiment of the present invention provides a system for treating a wound with suction. The exemplary system includes a wound cover, a pump having an input port and an output port with the input port providing suction to the wound via the wound cover, and a reservoir coupled to the output port of the pump and adapted to receive effluent from the wound.

According to another aspect of the present invention, the pump may be adapted to function during transport.

According to still another aspect of the present invention, the pump comprises an internal power source.

According to yet another aspect of the present invention, the reservoir can be a rigid container or a flexible bag formed from a polymeric film sealed substantially along a perimeter. The reservoir comprises a vent with a membrane to release gases while retaining waste materials.

According to still another aspect of the present invention, the reservoir further comprises a sensing means that determines when the collection means contains a predetermined quantity of effluent. According to a further aspect of the present invention, a feedback means provides a feedback signal from the wound via the wound cover to the pump. According to still a further aspect of the present invention, the feedback signal is indicative of a suction level beneath the wound cover.

According to yet another aspect of the present invention, a comparator circuit is coupled to the sensing means for determining the suction level beneath the wound cover.

According to yet a further aspect of the present invention, the pump comprises a controller.

According to still a further aspect of the present invention, the controller outputs a control signal to the pump to control operation of the pump, a state of the control signal based at least in part on the feedback signal. The control signal can also have at least two states corresponding to a pump operating speed and a pump idling or off speed. The control circuit can be further adapted to produce a first alarm signal and/or conduct a system shutdown in response to a predetermined condition of the feedback signal. According to yet another aspect of the present invention, the feedback means comprises a lumen adapted to conduct a negative pressure from the cover to the pump means.

According to yet a further aspect of the present invention, the feedback means is adapted to receive a fluid to at least partially purge wound effluent from the feedback means.

According to yet another aspect of the present invention, the feedback means is adapted to conduct an infusion fluid to the wound.

According to still another aspect of the present invention, the infusion fluid is selected from the group consisting of saline, an antiseptic, an antibiotic, an analgesic, an anesthetic, and an anti-inflammatory.

According to still a further aspect of the present invention, the infusion fluid may be warmed or chilled to provide a desired therapeutic benefit.

According to yet another aspect of the present invention, the pump delivers the infusion fluid by positive pressure. According to yet another aspect of the present invention, the pump is adapted to operate between a maximum speed and second speed responsive to pressure at the wound.

According to yet another aspect of the present invention, a change between the maximum speed and the second speed has a gradual profile. According to yet another aspect of the present invention, a change between the second speed and a further operating speed of the pump has a gradual profile. According to yet another aspect of the present invention, the system further comprises a wound contact material adapted to be placed beneath the wound cover and in intimate contact with at least one wound surface.

According to yet another aspect of the present invention, the system further comprises a collapsible wound packing material adapted to be placed between the wound cover and the wound contact material.

According to yet another aspect of the present invention, an effluent pressure line is coupled between the pump and the reservoir.

According to yet another aspect of the present invention, the system comprises a wound cover; a detector coupled to the wound cover to receive a signal representative of a level of suction at the wound; a regulator for regulating suction and coupled to the source of suction and the detector; a wound effluent container having first port coupled to the regulator and an effluent input port coupled to the wound cover, such that wound effluent is received via said effluent input port. According to yet another aspect of the present invention, the suction is provided from a pre-existing in-house suction system.

According to still another aspect of the present invention, the detector compares a level of suction present at the wound with a level of suction output from the controller and generates a signal to the controller responsive to said comparison . According to yet another aspect of the present invention, the system comprises cover means for covering the wound; pump means for at least generating the suction first coupling means for providing the suction to the wound cover from the pump means; collection means for collecting wound effluent via the wound cover; second coupling means for providing the wound effluent from the pump means to the collection means; and feedback means for providing a feedback signal from the cover means to the pump means.

According to yet another aspect of the present invention, the system comprises a wound cover; a container having at least one resilient portion, the container adapted to at least generate the suction and receive wound effluent; a conduit coupled between the wound cover and the container for providing the suction to the wound and extracting the wound effluent, wherein the suction is generated upon successive compression and release of a portion of the container, such that at least a portion of the gas in the resilient container is expelled from the resilient container upon compression and the suction is generated upon re-expansion of the resilient container to maintain a controlled a level of suction at the wound .

According to yet another aspect of the present invention, the container comprises a first member forming a first face of the container; a second member forming a second face of the container, the first and second members coupled to one another such that the second member can articulate with respect to the first member; a resilient member coupled between the first member and the second member; and a first check valve disposed in the container to expel gasses from the container upon compression of the container and prevent entry of gases into the container upon expansion of the container.

According to yet another aspect of the present invention, a second check valve is coupled between the container and the wound cover to permit flow of wound effluent from the wound to the container and prevent the backflow of gases from the container to the wound cover.

According to yet another aspect of the present invention, a medical waste collection container having a body portion defining an interior space comprises vent means for venting gases from the interior space while retaining waste materials.

These and other aspects will become apparent in view of the detailed description of the invention provided below.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is best understood from the following detailed description when read in connection with the accompanying drawings. It is emphasized that, according to common practice, the various features of the drawings are not to scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity. Included in the drawings are the following Figures:

Fig. 1 is a diagram of a system for treating wounds with suction according to a first exemplary embodiment of the present invention;

Fig. 2 is a cross sectional view illustrating an exemplary wound interface portion of the present invention;

Fig. 3 is a perspective view of a peristaltic pump suitable for use in an exemplary embodiment of the present invention;

Fig. 4 is an illustration of a system for treating wounds with suction according to another exemplary embodiment of the present invention; Fig. 5 is a cross sectional view of an effluent collection container of an exemplary embodiment of the present invention;

Fig. 6 is an illustration of a fluid infusion portion of an embodiment of the present invention;

Fig. 7 is a perspective view of another peristaltic pump adapted for use in an embodiment of the present invention;

Fig. 8 is a diagram of a system for treating wounds with suction according to a another embodiment of the present invention incorporating a diaphragm pump; Fig. 9 is a diagram of a system for treating wounds with suction according to a another embodiment of the present invention; and

Fig. 10 is a diagram of a system for treating wounds with suction adapted to operate using in-house suction. DETAILED DESCRIPTION OF THE INVENTION

Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention. Referring to Fig. 1, an exemplary system 1 for treating wounds with suction is shown. As illustrated in Fig. 1, wound W is on patient P. Building up from wound W, wound contact layer 2, which can be cut to fit the dimensions of wound W, is placed in intimate contact with one or more surfaces of wound W. Contact layer 2 is desirably formed from one or more permeable materials and is adapted to permit the underlying tissue to breathe as well as conduct fluids away from the wound surface. It is also desirable that the contact layer 2 maintains its modulus of compressibility in the presence of moisture. Such a suitable contact layer is described in United States Patent Application Number 10/982,346 filed November 4, 2004, which is incorporated herein by reference. For a wound that defines a substantial void, a suitable wound packing material 4 may be introduced into the wound above contact layer 2 to fill the wound void and assist in fluid removal. Wound packing material 4 is desirably formed from a minimally absorbent material and has a resiliently compressible structure adapted to conduct fluids away from the wound surface. It is also desirable that the packing material 4 maintains its modulus of compressibility in the presence of moisture. Such a suitable wound packing material is described in United States Patent Application

Number 10/981,119 filed November 4, 2004, which is incorporated herein by reference. Wound W is then covered and sealed by wound cover 6 which is desirably formed from a semi-permeable membrane adapted to permit transmission of oxygen and water vapor. At least a portion of wound cover 6 incorporates a pressure sensitive adhesive suitable for repeated attachment and detachment from the patient's skin, as is common in a clinical setting that requires routine inspection of underlying wound W. Application of wound cover 6 isolates the wound from environmental contaminants while permitting the wound to breathe, and also forms a substantially gas tight seal under which therapeutic suction may be applied. It is desirable if wound cover 6 is recloseable, thereby allowing the caregiver to tend to the wound as needed without the patient needing to repeatedly sustain the rigors of placement and removal of pressure sensitive adhesive materials. A suitable recloseable wound cover is described in United States Provisional Patent Application Number 60/625,819 filed November 8, 2004, which is incorporated herein by reference.

Suction delivery patch 10 is used to apply suction to the sealed space surrounding wound W. A suitable suction delivery patch 10 is described in United States Provisional Patent Application Number 60/625,880 filed November 8, 2004, which is incorporated herein by reference. Suction delivery patch 10 is coupled to suction conduit 14. The interface between delivery patch 10 and suction conduit 14 includes one or more apertures 12 (best shown in Fig. 2) for transmitting suction to the wound space and removing effluent (fluids and other waste materials) from the wound space. Suction conduit 14 may take the form of any lumen suitable for conducting the mostly liquid wound effluent away from the wound space. A flexible medical-grade tubing is typically suitable. The use of various types of conduit are contemplated including a ribbon-type tubing having a reduced profile, which may be desirable depending upon the geometry of the assembly. Suction conduit 14 communicates with pump 20 (discussed further below) which in-turn provides suction to wound W via delivery patch 10.

Referring again to Fig. 1, suction delivery patch 10 is also coupled to one end of a sensing conduit 16. Sensing conduit 16, like suction conduit 14, may take the form of any suitable lumen for transmitting negative pressure. The internal diameter of sensing conduit 16 may be comparatively smaller to that of suction conduit 14, because it is not intended to conduct wound effluent. In this exemplary embodiment, sensing conduit 16 is coupled to controller 30 (discussed further below) which is adapted to read the suction pressure of sensing conduit 16 and therefore the suction pressure at wound W. In one exemplary embodiment, a sensor (not shown), such as a mechanical or electrical pressure transducer, may be provided as part of delivery patch 10. In such an embodiment, the signal generated by the transducer is provided to controller 30, rather than the direct pneumatic signal from delivery patch 10.

In another exemplary embodiment of the present invention, sensing conduit 16 passively transmits the suction pressure at wound W to the controller 30. In this embodiment, controller 30 comprises an appropriate pressure sensor or converter to convert the pneumatic signal into an electrical signal useful for the controller, and upon which control of the system may be based. In a further exemplary embodiment of the present invention, sensing conduit 16 may be kept free of wound effluent undesirably aspirated into its passage by being fitted with a filter, check valve, and/or being designed to receive a low volume rinsing flow of a sterile fluid or gas. Pump 20 employed in the exemplary system may be one of any number of pump types known in the art. One such type is positive displacement pump, such as a peristaltic pump (best shown in Fig. 3), wherein suction conduit 14 is coupled to pump 20. Peristaltic pumps are well known in the art as being capable of pumping a 5 wide array of materials and to be tolerant to debris. Peristaltic pumps are cost effective in that they only require a short length of tubing as a working element for conveying fluids. Peristaltic pumps also isolate other elements from the fluids being conveyed and they are readily interfaced with control systems. Peristaltic pump head 21 will deliver waste materials to collection receptacle 24 (further discussed below). o Other pumping systems are readily applied to this system, such as, for example, a diaphragm style pump 23 as illustrated in Fig. 8 may be employed. A diaphragm pump is desirably driven by signal 26 from controller 30. Signal 30 may be in the form of a positive pressure pulse, a negative pressure pulse, a mechanical force or an electrical signal, for example. s In another exemplary embodiment of the present invention, as illustrated in Fig. 4, a bellows type device 40 may incorporate both the pump and collection receptacle (hereinafter referred to as pump/receptacle 40). In this system, suction conduit 14 is coupled between pump/receptacle 40 and wound W via suction delivery patch 10. Here, suction conduit 14 may also desirably include check valve 42 to limit Q the direction of the flow in the conduit to flow away from the wound space. In this way, exhaust of gases from pump/receptacle 40 are not conveyed to the wound. Additionally, sensing conduit 16 is coupled between wound W (again via suction delivery patch 10) and controller 30. Controller 30 is in turn coupled to drive system 52, such as an eccentric drive, to provide signal 26 to drive system 52. 5 In the embodiment illustrated in Fig. 4, face 44 is substantially stationary. Face 46 is coupled to face 44 at hinge point 48 such that face 46 can articulate about hinge point 48 relative to face 44. Resilient element 54, such as an accordion-style material, for example, is coupled to both face 44 and face 46 and proximate ends portions thereof to form a sealed internal space for the accumulation of Q waste materials. A portion of face 46 is coupled to eccentric drive 52 by coupling arm 50. In rotation, eccentric drive 52 results in the alternate collapse and expansion of pump/ receptacle 40. During collapse, gas is expelled through exit check valve 54 and membrane 56. During expansion, suction is created causing waste materials to be drawn into suction conduit 14 through check valve 42 and to be collected in the open 5 internal space of pump/ receptacle 40. This configuration reduces tubing connections and minimizes associated parts. Other types of pumps may be employed such as a vane or piston pump, for example. As in the previous embodiment, suction is provided to wound W until a desired suction level is reached as determined by the feedback provided to controller 30 via sensing line 16. Once this desired level is reached, controller 30 desirably reduces the rate at which pump/receptacle 40 collapses and expands to what the inventors term a "maintenance" speed. As time progresses, however, the level of suction at wound W is likely to be reduced due to minor leaks in the system or permeability of the wound cover, for example. Accordingly, upon controller 30 determining that the suction at wound W falls below a desired level, controller 30 will increase the speed at which pump/receptacle 40 collapses and expands, thus increasing suction at wound W to the desired level.

Referring again to Fig. 1, in one exemplary embodiment controller 30 provides an output signal 26 to drive pump 20. Output signal 26 is at least in part based on the difference between a predetermined desired suction level and the suction level determined by the system at wound W. A suitable algorithm determines a range of operating parameters to actuate pump 20 to generate and maintain suction in the enclosed wound space surrounding wound W.

Preferably, controller 30 includes one or more algorithms adapted to address different pump rates. One algorithm, upon initial startup of system 1, would signal pump 20 to initiate a relatively rapid λλdraw-down" speed for quickly evacuating atmospheric pressure from system 1, such as by operating at a maximum speed. A rapid draw-down speed would assist healthcare providers in quickly assessing the integrity of seals surrounding wound W as well as the integrity of the remainder of system 1. Another algorithm would signal pump 20 to assume an idling "maintenance" speed. This maintenance speed would permit operation continuously, assist in maintaining adequate system suction, and the life of the internal power source, such as a battery (if such an internal power source is employed) by reducing the power required to accelerate pump 20 from stop to start.

In another exemplary embodiment, it is contemplated that after a predetermined period of time after operating at the "maintenance" speed that the pump is turned off until such time as the system determines that the suction at the wound has decreased to a level requiring reactivation of pump 20.

Another exemplary algorithm would signal pump 20 to assume one or more "load" speeds which would increase the pump speed from the "maintenance" speed. Transitions between the various pump speeds would desirably be achieved by a gradual increase and/or decrease. A gradual speed increase and decrease is preferred in order to minimize abrupt noise level changes that are prone to disturb patient P or other room occupants. In one exemplary embodiment, pump 20 can is adapted to accommodate any one or more of the PID modes; that is, a proportional mode, an integral mode and/or a derivative mode.

As is also typical of controllers, numerous control paradigms are contemplated to trigger alarms, provide operational information, perform data logging, etc. In particular, one or more alarms are contemplated. For example, an alarm and/or system shutdown may be triggered when the collection receptacle is filled to a predetermined level, such as full or nearly full. Such a state may be based on one or more of weight, volume or pressure. In one embodiment, a non contact sensing system is contemplated, such as a sensor which determines a fill state of the container based on the capacitance of the container. This capacitance my be determined though the enclosure of the controller, thus permitting the controller to "see" the level in the collection receptacle. A data logging feature is also contemplated whereby a profile of the system's operation over time would be recorded and outputted to a display (not shown). This feature would assist the monitoring of patient treatment and system troubleshooting.

Controller 30 may be electrically powered through onboard batteries or may be plugged in to conventional AC power or a combination of both.

Collection receptacle 24 is illustrated in Fig. 1 as a typical hospital waste- type rigid container with a cap for the attachment of tubing such as suction conduit 22. An advantage of system 1 over similar systems that are designed to deliver suction to a wound through a collection receptacle (i.e., the receptacle is disposed between the pump and the wound) is that in the present invention the collection receptacle can be a flexible bag. Flexible bags are generally convenient for the collection of waste materials due to ease of handling and reduced cost. Numerous ostomy devices employ bags for waste accumulation and are well received in the marketplace. A flexible bag receptacle may be more well suited to patients that need to maintain a degree of portability.

Thus, as illustrated in Fig. 5, collection receptacle 24 may be a collection bag 60 formed from a rugged polymeric film and sealed by any suitable means known in the art at edges 62. Collection bag 60 is coupled to waste conduit 22 to receive the wound effluent waste stream. Collection bag 60 desirably incorporates a gas discriminating filter 64 for eliminating excess gas from system 1. In order to maintain near atmospheric levels of pressure within receptacle 24, excess gas that might be generated as a result of a leak in any of the system components upstream of the pump 20 can thus be expelled. In the event that gas discriminating filter 64 becomes occluded, it is anticipated that overpressure safety mechanisms (not shown) can be incorporated into collection receptacle 24 to guard against excess fluid removal from the patient.

In one exemplary embodiment of the present invention, an infusion system 80 as illustrated in Fig. 6 is contemplated for the delivery of one or more therapeutic solutions to wound W. Therapeutic solutions ranging from simple saline to medicated solutions including an antiseptic, antibiotic, analgesic, anti -inflammatory or other suitable pharmaceutically active ingredient are contemplated. Further, these therapeutic solutions may be warmed or chilled for additional therapeutic benefit, as desired. At its distal end, fluid delivery conduit 82 is coupled to suction delivery patch 10 to permit fluid communication beneath delivery patch 10. At its proximal end, fluid delivery conduit 82 is coupled to reservoir 84, such as an LV. bag. In one embodiment of the present invention, flow from reservoir 84 down through fluid delivery conduit 82 is gravimetric. In one embodiment conduit 84 is equipped with a pressure sensor 86 generally known in the art, such as a electrical transducer or a mechanical transducer. Sensor 86 reads the pressure of delivery conduit 82, which is indicative of the pressure at the wound site, and produces an electrical or mechanical signal which is in-turn provided to controller 30. The therapeutic solutions may also be delivered to the wound responsive to a negative pressure in the wound, thus urging the therapeutic solutions through delivery conduit 82. Alternatively, infusion fluid may be positively delivered through delivery conduit 82 by infusion pump 90 integrated into conduit 82. Pump driven infusion would permit more precise control of the dosing delivered. As with suction pump 20, infusion pump 90 may take the form of any suitable pump design. For the same reasons cited previously for pump 20, infusion pump 90 is preferably a peristaltic pump. Infusion pump 90 can also be coupled to controller 30 to provide pump operation information and to receive control signals similar to those described for suction pump 20. One alternative embodiment of system 1 incorporates a dual head peristaltic pump 100 as shown in Fig. 7. Using dual head peristaltic pump 100, first head 104 performs the function of suction pump 20. In one embodiment, second head 102 substantially simultaneously performs the function of infusion pump 90. This latter embodiment contemplates a single drive mechanism driving first head 104 and second head 102. The invention is not so limited, however, in that two separate drive mechanisms may be employed to drive first head 104 either independently from, or at a different rate than, that of second head 102. Since no two pumps can be exactly synchronized, a pressure/vacuum controller may desirably be used to slow or speed up the drainage pump to maintain a desired vacuum. Fig. 8 illustrates a further exemplary system for treating wounds incorporating a diaphragm pump 23 as the means for providing suction to the wound space.

Referring now to Fig. 9, another exemplary embodiment of the present invention is shown. As illustrated in Fig. 9, a restrictor 202 is coupled to sensing conduit 16 at conduit intersection 204. Filter/inlet 200 is coupled to restrictor 202 to permit an adjustable bleed point for sensing conduit 16. Fig. 9 also illustrates a container sensing line 220 coupled between container 24 and fault detector 304 of controller 30. In one exemplary embodiment, fault detector 304 receives a signal via sensing line 220 indicative of the presence or absence of container 24. Fault detector 304 is coupled to motor controller 320. As discussed above, the stimuli for an alarm or system shutdown can thus be received by controller 30 and subsequently communicated to appropriate system components. Pump 20 is also coupled to container sensing line 220. Coupling pump 20 to sensing line 220 desirably provides a back-up or redundancy to shutdown pump 20 in the event of a container fault. It is recognized that restrictor 202 serves a multitude of purposes: restrictor 202 provides a low-level bias flow whose presence indicates non obstructed operation and will provide positive pressure relief should infusion flow from pump 90 transiently exceed evacuation flow via pump 20. As illustrated in Fig. 9, controller 30 includes wound pressure receiver

300 coupled to sensing line 16 and logic circuit 306. In turn logic circuit is coupled to motor controller 320. Thus, pressure receiver 300 communicates pressure information from sensing line 16 to logic circuit 306 and on to motor controller 320. Likewise, gas pressure receiver 302 is coupled to gas filled conduit 28. Gas pressure receiver 302 is also coupled to logic circuit 308 which in turn is coupled to motor controller 320.

Additionally, it is contemplated that any well-known internal power source 322, such as a battery for example, may be incorporated if desired to provide functionality of controller 30 during transport. As can be appreciated by one skilled in the art, internal power source 322 is coupled to the various subassemblies within controller 30. Fig. 10 illustrates a further exemplary system for treating wounds is shown incorporating an in-house vacuum source 400. This embodiment is primarily distinguished from previously disclosed embodiments by use of in-house suction source 400 in lieu of pump 20. As shown in Fig. 10, input port 410 of suction control (regulator) 401 is attached to a hospital wall suction system 400. Regulator 401 is capable of providing a regulated level of suction in the therapeutic range for wound drainage. Conduit 402 connects output port 412 of regulator 401 to suction port 418 of waste receptacle 403 and port 414 of leak detection sensor 406. Waste receptacle 403 also comprises another port 404 that is connected to wound W via conduit 405 and port 420 of suction delivery patch 10. Second port 422 is coupled to leak detection sensor 406 via conduit 407.

Optionally, a pressure difference measuring device, such as flow sensor 426, may be coupled between regulator 401 and wound cover 10. Flow sensor 426 may be any of various well-known types, such as a rotometer, a hot-wire anemometer, a mass flow sensor, differential pressure transducer, etc. Further, although flow meter 426 is illustrated adjacent an input of waste receptacle 403, the invention is not so limited in that flow meter 403 may be located at other points in the pneumatic circuit between regulator 401 and wound cover 10.

Leak detection sensor 406 compares the suction pressure applied to receptacle 403 to the actual suction pressure present in the wound space W. In one exemplary embodiment, leak detection sensor 406 is a differential pressure gauge. When no leak is present in the circuit and wound covering, the same pressure is applied to both sides of a diaphragm, thus, registering zero differential pressure and consequently no leak. As leaks are encountered, however, a lower pressure in the wound space occurs, resulting in a reduced pressure signal in conduit 407. In one exemplary embodiment, when this difference reaches a first predetermined level, such as 10% below the setting of regulator 401 for example, a signal may be provided to regulator 401, which in turn provides additional suction to port 418 of waste receptacle 403. In turn, when the difference is reduced to a second predetermined level, leak detection sensor 406 signals regulator 401 such that regulator 401 reduces the suction provided to waste receptacle 403. Further, differential pressures may desirably be calibrated to reflect an actual flow rate of a leak in the wound dressing. Further, similar to the exemplary embodiment of Fig. 9, filter/inlet 200 and restrictor 202 may be coupled to conduit 407.

In order to facilitate the accuracy of suction pressure measurements, it is necessary to keep conduit 407 clear of any trace amounts of fluids. It is recognized that slugs of fluid that are present in a pressure sensing line will impact the indicated pressure level. Fluids may enter the sensing conduit 407 through the ports adjacent the wound during any period where the suction is turned off or the system is disconnected from the patient. The system addresses this condition by allowing a small but controlled flow of air into conduit 407 via restrictor 202. This low flow serves to purge any slugs of fluid from conduit 407 when suction is applied to the wound. The flow through the restrictor also serves to indicate a non -obstructed condition when present. It is also important to filter the air using filter 200 to guard against the migration of microorganisms to the wound. Wound pressure may be inferred from the rate of flow to the pump.

It will be recognized that it is not routine practice to disinfect hospital suction controls between each patient and it is necessary to guard against cross contamination of the patient by equipment. To that end, and to facilitate disconnecting of the system from the patient, a connector 430 in the sensing line 407 is employed. Connector 430 further employs a filter 431 that allows the passage of gas for pressure sensing, but is a barrier to fluids and microorganisms. Filter 431 functions to contain any wound fluids that could leak out of the conduit 407 and will preserve the cleanliness of the entire control. Flow through restrictor 202 can be adjusted to be sufficiently low so as to have minimal impact on the pressure reading, but still be effective in purging the line.

Although the connector 430 and filter 431 are described in conjunction with this particular embodiment, it will be recognized that they may also be used in any of the embodiments described herein as desired.

Measuring the flow of air as a means of determining the sealed condition of the wound has distinct advantages. When flow sensor 426 is placed downstream of waste receptacle 403, there is separation of fluids from air resulting in a non- contaminated line. Typical hospital collection containers incorporate filter-shutoff devices to guard against overflow and to protect the Hospital wall circuitry. In this manner, the sensor becomes isolated from patient fluids and reduces the risk of cross contamination. Also, it is readily possible to determine the suction level in the wound knowing the suction setting on regulator 401 and the leak rate determined by sensor 426. Thus, a simple, mechanical system is available to readily determine that a proper level of suction is selected and that the leak rate is sufficiently low as to provide a therapeutic level of suction to the wound.

Although the invention is illustrated and described herein with reference to specific embodiments, the invention is not intended to be limited to the details shown. Rather, various modifications may be made in the details within the scope and range of equivalents of the claims and without departing from the invention.

Claims

What is Claimed: 1. A system for treating a wound with suction, the system comprising: a wound cover; a pump having an input port and an output port, said input port providing suction to the wound via said wound cover; and a reservoir coupled to said output port of said pump, said reservoir adapted to receive effluent, wherein the wound is maintained at a controlled level of suction.
2. The system of claim 1, wherein said pump is adapted to be functional during transport.
3. The system of claim 1, wherein said pump further comprises an internal power source.
4. The system of claim 1, wherein said reservoir comprises: a polymeric film sealed substantially along a perimeter; and a vent comprising a membrane adapted to release gases while retaining waste materials.
5. The system of claim 1, wherein the pump further comprises sensing means adapted to sense at least one of a presence, a quantity and/or a type of the effluent.
6. The system of claim 1, wherein said wound cover is recloseable.
7. The system of claim 1, further comprising feedback means for providing a feedback signal from the wound to said pump.
8. The system of claim 7, wherein said feedback signal is indicative of a suction level beneath said wound cover.
9. The system of claim 8, further comprising a comparator circuit coupled to said sensing means for determining the suction level beneath said wound cover.
10. The system of claim 7, wherein said feedback means comprises a lumen adapted to conduct a negative pressure from said wound cover to said pump.
11. The system of claim 7, wherein said feedback means is adapted to receive a fluid to at least partially purge wound effluent from said feedback means.
12. The system of claim 7, further comprising a restrictor coupled to said feedback means to provide a low-level bias flow from atmosphere to said feedback means.
13. The system of claim 12, wherein a level of said low-level bias is indicative of an operational condition of said system.
14. The system according to claim 13, wherein said operational condition is at least one of a high flow, a low flow, or a normal flow within said system.
15. The system of claim 12, wherein said restrictor provides flow balance to maintain negative pressure within the wound.
16. The system of claim 1, wherein the wound cover is adapted to conduct an infusion fluid to the wound.
17. The system of claim 16, wherein the infusion fluid is selected from the group consisting of saline, an antiseptic, an antibiotic, an analgesic, an anesthetic, an anti-inflammatory, a growth hormone, a biologically active compound, and a compound containing stem cells.
18. The system of claim 16, wherein the infusion fluid may be warmed or cooled.
19. The system of claim 1, wherein the pump comprises a controller.
20. The system of claim 19, wherein said controller outputs a control signal to said pump to control operation of said pump, a state of said control signal based at least in part on a pressure at the wound.
21. The system of claim 20, wherein the control signal has at least two states.
22. The system of claim 21, wherein a first state corresponds to a pump operating speed and a second state corresponds to one of a pump idling speed or an off state.
23. The system of claim 21, wherein a first state corresponds to a pump operating speed, a second state corresponds to a pump idling speed, and a third state corresponds to an off state of said pump, said third state being entered after said pump is operated at said second state for a predetermined period of time.
24. The system of claim 19, further adapted to produce a first alarm signal and/or conduct a system shutdown in response to a predetermined condition.
25. The system of claim 1, wherein said pump is a positive displacement pump.
26. The system of claim 25, wherein said positive displacement pump is a piston pump, a peristaltic pump, or a diaphragm pump.
27. The system of claim 1, wherein the pump is adapted to produce a predetermined cyclical suction profile.
28. The system of claim 27, wherein the cyclical suction profile varies from under a first nominal capillary bed pressure and a second elevated pressure between about 100 mm Hg and about 200 mm Hg.
29. The system of claim 1, wherein the pump is adapted to operate between a maximum speed and a second speed responsive to pressure at the wound.
30. The system of claim 29, wherein a change between the maximum speed and the second speed has a gradual profile.
31. The system of claim 29, wherein a change between the second speed and a further operating speed of said pump has a gradual profile.
32. The system of claim 1, further comprising a wound contact material adapted to be placed beneath the wound cover and in contact with at least one wound surface.
33. The system of claim 32, further comprising a collapsible wound packing material adapted to be placed between said wound cover and said wound contact material.
34. The system of claim 1, further comprising an infusion fluid container and a further conduit coupled between said infusion fluid container and said wound cover.
35. The system of claim 34, wherein said infusion fluid container and said further conduit are adapted to deliver an infusion fluid to the wound by gravity.
36. The system of claim 35, wherein the fluid may be delivered responsive to a negative pressure in the wound.
37. The system of claim 34, wherein said pump comprises a peristaltic pump and said peristaltic pump is coupled to said further conduit to deliver the infusion fluid by positive pressure.
38. The system of claim 37, further comprising means to balance flow rate to maintain negative pressure within the wound.
39. The system of claim 34, further comprising pressure sensing means coupled to said further conduit.
40. The system of claim 1, further comprising an effluent pressure line coupled between said pump and said reservoir.
41. A system for treating a wound with a source of suction, the system comprising: a wound cover; a regulator for regulating suction and coupled to the source of suction; a wound effluent container having a first port coupled to said regulator and an effluent input port coupled to said wound cover, wherein wound effluent is received via said effluent input port; a detector in fluid tight relation with at least one of said wound cover and/or said container, said detector adapted to determine a sealing state of the wound cover; and a connector disposed between said detector and said wound cover allowing selective coupling and uncoupling of said wound cover from said detector, said connector comprising a filter to prevent entry of contaminants into said wound or leakage of fluid from said connector while uncoupled.
42. The system of claim 41, wherein said detector is disposed between said regulator and said wound cover.
43. The system of claim 41, wherein said detector is disposed between said wound effluent container and said wound cover.
44. The system of claim 41, wherein the source of suction is a pre-existing in-house suction system.
45. The system of claim 41, further comprising a flow meter disposed between said regulator and said wound cover.
46. The system of claim 41, wherein said detector compares a level of suction present at the wound with a level of suction output from said controller and generates a signal to said comparison.
47. The system of claim 41, further comprising a wound contact material adapted to be placed beneath the wound cover and in contact with at least one wound surface.
48. The system of claim 41, further comprising a collapsible wound packing material adapted to be placed between said wound cover and said wound contact material.
49. The system of claim 41, wherein said wound cover is recloseable.
50. A system for treating a wound with suction, the system comprising: cover means for covering the wound; suction means for at least generating the suction; means for providing the suction to the wound via said cover means from said suction means; collection means for collecting wound effluent via said cover means; means for providing the wound effluent from said suction means to said collection means; and feedback means for providing a feedback signal from the wound to said suction means.
51. The system of claim 50, further comprising sensing means for sensing a pressure level at the wound.
52. The system of claim 50, further comprising means for providing a source of fluid to the wound.
53. The system of claim 52, wherein the fluid is selected from the group consisting of saline, an antiseptic, an antibiotic, an analgesic, an anesthetic, and an anti-inflammatory.
54. The system of claim 52, wherein the sensing means is coupled to the fluid providing means.
55. A system for treating a wound with suction, the system comprising : a wound cover; a container adapted to at least generate the suction and receive wound effluent; a first conduit coupled between said wound cover and said container for providing the suction to the wound and extracting the wound effluent, wherein the wound is maintained at a controlled level of suction upon successive compression and release of a portion of said container, such that at least a portion of gas in said container is expelled from said container upon compression and the suction is-generated upon re-expansion of the container to maintain a controlled a level of suction at the wound.
56. The system of claim 55, wherein the container comprises: a first member forming a first face of the container; a second member forming a second face of the container, the first and second members coupled to one another such that the second member can articulate with respect to the first member; a resilient member coupled between the first member and the second member; and a first check valve disposed in the container to expel gasses from the container upon compression of the container and prevent entry of gases into the container upon expansion of the container.
57. The system of claim 56, further comprising a second check valve coupled between the container and the wound cover to permit flow of wound effluent from the wound to the container and prevent the flow of gases from the container to the wound cover.
58. A method for treating a wound with suction, the method comprising the steps of: operating a source of suction at a load speed; applying the suction to the wound; determining when the suction at the wound reaches a predetermined level; and reducing a speed of the source of suction to a second speed based on said determination over a predetermined period of time.
59. The method according to claim 58, wherein the second speed is other than a zero speed.
60. The method of claim 58, further comprising the steps of: determining when the suction at the wound reaches a further predetermined level; and increasing the speed of the source of suction to said load speed said determination over a predetermined period of time.
61. A system for treating a wound with a source of suction, the system comprising : a wound cover; a regulator for regulating suction and coupled to the source of suction; a wound effluent container having a first port coupled to said regulator and an effluent input port coupled to said wound cover, wherein wound effluent is received via said effluent input port; and a detector coupled to said wound cover and adapted to indicate airflow through said wound effluent container, thus indicating a sealing state of said wound cover.
62. The system according to claim 61, wherein said detector is disposed between said regulator and said wound effluent container.
63. The system according to claim 61, wherein said detector is disposed between said regulator and the source of suction.
64. The system according to claim 61, wherein said detector is disposed between said wound effluent container and said wound cover.
PCT/US2005/039996 2003-09-16 2005-11-03 Apparatus and method for suction-assisted wound healing WO2006052745A3 (en)

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US60/625,896 2004-11-08
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US60/648,771 2005-02-01
US11/226,505 2005-09-14
US11226505 US7625362B2 (en) 2003-09-16 2005-09-14 Apparatus and method for suction-assisted wound healing

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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008049029A2 (en) * 2006-10-17 2008-04-24 Bluesky Medical Group Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
WO2008048481A3 (en) * 2006-10-13 2008-09-12 Bluesky Medical Group Inc Improved control circuit and apparatus for negative pressure wound treatment
WO2009004367A1 (en) 2007-07-02 2009-01-08 Smith & Nephew Plc Wound treatment apparatus with a control system connected to a flow meter and a pressure sensor
WO2009019420A1 (en) * 2007-08-06 2009-02-12 Smith & Nephew Plc Pump pressure control
WO2009040809A1 (en) * 2007-09-28 2009-04-02 Inolase 2002 Ltd. Vacuum assisted treatment of the skin
WO2009004288A3 (en) * 2007-07-02 2009-04-16 Smith & Nephew Pressure control
WO2009071924A1 (en) * 2007-12-06 2009-06-11 Smith & Nephew Plc Apparatus and method for wound volume measurement
JP2010504816A (en) * 2006-09-26 2010-02-18 ボリンジャー・テクノロジーズ・エル・ピー Pump system for negative pressure wound therapy
US7771374B2 (en) 2001-12-10 2010-08-10 Candela Corporation Method and apparatus for vacuum-assisted light-based treatments of the skin
EP2216057A2 (en) 2007-05-07 2010-08-11 Carmeli Adahan Suction system
US8241260B2 (en) 2008-04-21 2012-08-14 Enzysurge Ltd. Liquid streaming devices for treating wounds, method of making such devices, and method of using such devices for treating wounds
US8333744B2 (en) 2007-08-06 2012-12-18 Edward Hartwell Apparatus for the provision of topical negative pressure therapy
WO2013049834A3 (en) * 2011-09-30 2013-05-30 Eksigent Technologies, Llc Electrokinetic pump based wound treatment system and methods
US8494349B2 (en) 2007-07-02 2013-07-23 Smith & Nephew Plc Measuring pressure
US8715256B2 (en) 2007-11-21 2014-05-06 Smith & Nephew Plc Vacuum assisted wound dressing
US8764732B2 (en) 2007-11-21 2014-07-01 Smith & Nephew Plc Wound dressing
US8808274B2 (en) 2007-11-21 2014-08-19 Smith & Nephew Plc Wound dressing
US8843327B2 (en) 2007-08-06 2014-09-23 Smith & Nephew Plc Canister status determination
US8845603B2 (en) 2007-07-02 2014-09-30 Smith & Nephew Plc Silencer for vacuum system of a wound drainage apparatus
US8974429B2 (en) 2007-08-06 2015-03-10 Smith & Nephew Plc Apparatus and method for applying topical negative pressure
US9050399B2 (en) 2007-07-02 2015-06-09 Smith & Nephew Plc Wound treatment apparatus with exudate volume reduction by heat
US9050398B2 (en) 2010-12-22 2015-06-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9061095B2 (en) 2010-04-27 2015-06-23 Smith & Nephew Plc Wound dressing and method of use
EP2109472B1 (en) 2007-02-09 2015-08-19 KCI Licensing, Inc. System for managing reduced pressure at a tissue site
EP3047793A1 (en) 2015-01-20 2016-07-27 ATMOS MedizinTechnik GmbH & Co. KG Wound dressing and use of a wound dressing
US9642750B2 (en) 2009-12-22 2017-05-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9642955B2 (en) 2006-09-28 2017-05-09 Smith & Nephew, Inc. Portable wound therapy system
EP3216481A1 (en) * 2006-09-19 2017-09-13 KCI Licensing, Inc. System for locating fluid leaks at a drape of a reduced pressure delivery system
US9801985B2 (en) 2007-12-06 2017-10-31 Smith & Nephew Plc Apparatus for topical negative pressure therapy
US9907703B2 (en) 2012-05-23 2018-03-06 Smith & Nephew Plc Apparatuses and methods for negative pressure wound therapy
EP2051675B2 (en) 2006-08-04 2018-04-18 KCI Medical Resources Wound-stimulating unit
US9956329B2 (en) 2008-03-07 2018-05-01 Smith & Nephew, Inc. Wound dressing port and associated wound dressing

Families Citing this family (145)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6075660B2 (en) * 1987-03-23 2017-02-08 ケーシーアイ ライセンシング インコーポレイテッド Ceramic foam filter
US7625362B2 (en) * 2003-09-16 2009-12-01 Boehringer Technologies, L.P. Apparatus and method for suction-assisted wound healing
GB0224986D0 (en) 2002-10-28 2002-12-04 Smith & Nephew Apparatus
US7361184B2 (en) * 2003-09-08 2008-04-22 Joshi Ashok V Device and method for wound therapy
GB0325130D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus with scaffold
GB0325129D0 (en) 2003-10-28 2003-12-03 Smith & Nephew Apparatus in situ
US8758313B2 (en) 2003-10-28 2014-06-24 Smith & Nephew Plc Apparatus and method for wound cleansing with actives
US7776028B2 (en) 2004-04-05 2010-08-17 Bluesky Medical Group Incorporated Adjustable overlay reduced pressure wound treatment system
US20110118683A1 (en) * 2004-04-05 2011-05-19 Richard Scott Weston Reduced pressure treatment system
US7909805B2 (en) 2004-04-05 2011-03-22 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US7708724B2 (en) * 2004-04-05 2010-05-04 Blue Sky Medical Group Incorporated Reduced pressure wound cupping treatment system
US8529548B2 (en) 2004-04-27 2013-09-10 Smith & Nephew Plc Wound treatment apparatus and method
GB0409444D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
GB0409446D0 (en) 2004-04-28 2004-06-02 Smith & Nephew Apparatus
US8062272B2 (en) 2004-05-21 2011-11-22 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
GB0508528D0 (en) * 2005-04-27 2005-06-01 Smith & Nephew SAI with macrostress
US20110077605A1 (en) * 2005-07-14 2011-03-31 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy
US7857806B2 (en) * 2005-07-14 2010-12-28 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy
US7438705B2 (en) 2005-07-14 2008-10-21 Boehringer Technologies, L.P. System for treating a wound with suction and method detecting loss of suction
US7608066B2 (en) * 2005-08-08 2009-10-27 Innovative Therapies, Inc. Wound irrigation device pressure monitoring and control system
US7837673B2 (en) 2005-08-08 2010-11-23 Innovative Therapies, Inc. Wound irrigation device
JP2009509570A (en) 2005-09-07 2009-03-12 タイコ ヘルスケア グループ リミテッド パートナーシップ Self-contained wound dressing devices
CA2619925A1 (en) 2005-09-07 2007-03-15 Tyco Healthcare Group Lp Wound dressing with vacuum reservoir
EP1922045B1 (en) 2005-09-07 2012-11-07 Tyco Healthcare Group LP Self contained wound dressing with micropump
GB0518804D0 (en) 2005-09-15 2005-10-26 Smith & Nephew Exudialysis tissue cleanser
GB0524027D0 (en) * 2005-11-25 2006-01-04 Smith & Nephew Fibrous dressing
US7503910B2 (en) 2006-02-01 2009-03-17 Carmeli Adahan Suctioning system, method and kit
EP1986718B1 (en) * 2006-02-06 2015-10-28 KCI Licensing, Inc. Systems for improved connection to wound dressings in conjunction with reduced pressure wound treatment systems
US8235939B2 (en) 2006-02-06 2012-08-07 Kci Licensing, Inc. System and method for purging a reduced pressure apparatus during the administration of reduced pressure treatment
US7476405B2 (en) * 2006-02-23 2009-01-13 Iomedix Sleep International Srl Compositions and methods for the induction and maintenance of quality sleep
US8029498B2 (en) 2006-03-14 2011-10-04 Kci Licensing Inc. System for percutaneously administering reduced pressure treatment using balloon dissection
US9456860B2 (en) 2006-03-14 2016-10-04 Kci Licensing, Inc. Bioresorbable foaming tissue dressing
CA2746525C (en) 2008-12-31 2017-12-12 Kci Licensing, Inc. Manifolds, systems, and methods for administering reduced pressure to a subcutaneous tissue site
WO2007116387A3 (en) * 2006-04-07 2007-12-27 Avonmed Healthcare Ltd A fluid flow indicator
US7615036B2 (en) * 2006-05-11 2009-11-10 Kalypto Medical, Inc. Device and method for wound therapy
US7779625B2 (en) 2006-05-11 2010-08-24 Kalypto Medical, Inc. Device and method for wound therapy
US8366690B2 (en) * 2006-09-19 2013-02-05 Kci Licensing, Inc. System and method for determining a fill status of a canister of fluid in a reduced pressure treatment system
ES2642043T3 (en) * 2006-09-19 2017-11-15 Kci Licensing, Inc. Treatment system is likely reduced pressure clearance of obstruction and pressure protection dual zone
US9820888B2 (en) 2006-09-26 2017-11-21 Smith & Nephew, Inc. Wound dressing
US20080243096A1 (en) * 2006-10-05 2008-10-02 Paul Svedman Device For Active Treatment and Regeneration of Tissues Such as Wounds
US8287507B2 (en) * 2006-10-13 2012-10-16 Kci Licensing, Inc. Reduced pressure indicator for a reduced pressure source
CN101547712B (en) 2006-10-13 2012-05-30 凯希特许有限公司 Reduced pressure delivery system having a manually-activated pump for providing treatment to low-severity wounds
DE102006053609A1 (en) * 2006-11-14 2008-05-15 Erbe Elektromedizin Gmbh medical pump
US7931651B2 (en) 2006-11-17 2011-04-26 Wake Lake University Health Sciences External fixation assembly and method of use
US8377016B2 (en) 2007-01-10 2013-02-19 Wake Forest University Health Sciences Apparatus and method for wound treatment employing periodic sub-atmospheric pressure
US7758476B2 (en) * 2007-02-06 2010-07-20 Fitness Botics Inflatable cushion bag for striking
US8388584B2 (en) * 2007-02-09 2013-03-05 Twin Star Medical, Inc. Method and system for the use of hollow fiber catheters in topical applications
US8535283B2 (en) * 2007-02-09 2013-09-17 Kci Licensing, Inc. System and method for applying reduced pressure at a tissue site
JP4808811B2 (en) 2007-02-20 2011-11-02 ケーシーアイ ライセンシング インコーポレイテッド System and method for identifying a leak from the canister engagement off state in the reduced pressure treatment system
US9408954B2 (en) 2007-07-02 2016-08-09 Smith & Nephew Plc Systems and methods for controlling operation of negative pressure wound therapy apparatus
US7790946B2 (en) * 2007-07-06 2010-09-07 Tyco Healthcare Group Lp Subatmospheric pressure wound therapy dressing
WO2009016603A3 (en) * 2007-08-01 2009-07-02 Blackbeard Graham Alan Reduced pressure wound treatment apparatus
GB0715263D0 (en) * 2007-08-06 2007-09-12 Smith & Nephew Determining pressure
WO2009049058A1 (en) 2007-10-10 2009-04-16 Wake Forest University Health Sciences Devices and methods for treating spinal cord tissue
CA2703942A1 (en) * 2007-10-23 2009-04-30 Boehringer Technologies, L.P. Thin film wound cover, suction assisted wound treatment system using the same, method of using the thin film wound cover and method of making the same
GB0724564D0 (en) * 2007-12-18 2008-01-30 Smith & Nephew Portable wound therapy apparatus and method
CA2710880C (en) 2008-01-09 2017-10-31 Wake Forest University Health Sciences Device and method for treating central nervous system pathology
GB0803059D0 (en) * 2008-02-20 2008-03-26 Smith & Nephew Mobile substrate attachment device
GB0804654D0 (en) 2008-03-13 2008-04-16 Smith & Nephew Vacuum closure device
US9199012B2 (en) 2008-03-13 2015-12-01 Smith & Nephew, Inc. Shear resistant wound dressing for use in vacuum wound therapy
WO2009137194A4 (en) * 2008-04-01 2010-02-25 Ohio Medical Corporation Wound treatment system
CA2723138C (en) * 2008-05-02 2016-12-20 Richard Daniel John Coulthard Manually-actuated reduced pressure treatment system having regulated pressure capabilities
US20090281509A1 (en) * 2008-05-12 2009-11-12 Gellis Michael B Apparatus to collect body fluids following liposuction surgery
US8414519B2 (en) 2008-05-21 2013-04-09 Covidien Lp Wound therapy system with portable container apparatus
US8048046B2 (en) 2008-05-21 2011-11-01 Tyco Healthcare Group Lp Wound therapy system with housing and canister support
US20090299306A1 (en) * 2008-05-27 2009-12-03 John Buan Control unit with pump module for a negative pressure wound therapy device
US20090299251A1 (en) * 2008-05-27 2009-12-03 John Buan Negative pressure wound therapy device
GB0811457D0 (en) * 2008-06-23 2008-07-30 Adahan Carmeli Wound enclosure
US8257326B2 (en) * 2008-06-30 2012-09-04 Tyco Healthcare Group Lp Apparatus for enhancing wound healing
EP2300069B1 (en) * 2008-07-08 2017-12-13 Smith & Nephew, Inc Portable negative pressure wound therapy device
US8007481B2 (en) 2008-07-17 2011-08-30 Tyco Healthcare Group Lp Subatmospheric pressure mechanism for wound therapy system
CA2730362A1 (en) 2008-07-18 2010-01-21 Wake Forest University Health Sciences Apparatus and method for cardiac tissue modulation by topical application of vacuum to minimize cell death and damage
US8021347B2 (en) 2008-07-21 2011-09-20 Tyco Healthcare Group Lp Thin film wound dressing
US20100022990A1 (en) 2008-07-25 2010-01-28 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy and improvements thereon
WO2010017484A3 (en) 2008-08-08 2010-07-22 Kci Licensing, Inc. Reduced-pressure treatment systems with reservoir control
EP2309961B1 (en) 2008-08-08 2017-12-06 Smith & Nephew, Inc. Wound dressing of continuous fibers
US8827983B2 (en) 2008-08-21 2014-09-09 Smith & Nephew, Inc. Sensor with electrical contact protection for use in fluid collection canister and negative pressure wound therapy systems including same
US9414968B2 (en) 2008-09-05 2016-08-16 Smith & Nephew, Inc. Three-dimensional porous film contact layer with improved wound healing
US8177763B2 (en) 2008-09-05 2012-05-15 Tyco Healthcare Group Lp Canister membrane for wound therapy system
US8216198B2 (en) 2009-01-09 2012-07-10 Tyco Healthcare Group Lp Canister for receiving wound exudate in a negative pressure therapy system
US8162907B2 (en) * 2009-01-20 2012-04-24 Tyco Healthcare Group Lp Method and apparatus for bridging from a dressing in negative pressure wound therapy
US8246591B2 (en) 2009-01-23 2012-08-21 Tyco Healthcare Group Lp Flanged connector for wound therapy
US20100191198A1 (en) * 2009-01-26 2010-07-29 Tyco Healthcare Group Lp Wound Filler Material with Improved Nonadherency Properties
US8167869B2 (en) 2009-02-10 2012-05-01 Tyco Healthcare Group Lp Wound therapy system with proportional valve mechanism
US20100204752A1 (en) * 2009-02-10 2010-08-12 Tyco Healthcare Group Lp Negative Pressure and Electrostimulation Therapy Apparatus
GB0902368D0 (en) 2009-02-13 2009-04-01 Smith & Nephew Wound packing
KR101019714B1 (en) * 2009-04-01 2011-03-07 쓰리디이미징앤시뮬레이션즈(주) Apparatus for acquiring digital X-ray image
US8663198B2 (en) * 2009-04-17 2014-03-04 Kalypto Medical, Inc. Negative pressure wound therapy device
US8251979B2 (en) 2009-05-11 2012-08-28 Tyco Healthcare Group Lp Orientation independent canister for a negative pressure wound therapy device
US20100305523A1 (en) * 2009-05-27 2010-12-02 Tyco Healthcare Group Lp Active Exudate Control System
US8298200B2 (en) 2009-06-01 2012-10-30 Tyco Healthcare Group Lp System for providing continual drainage in negative pressure wound therapy
US20110196321A1 (en) 2009-06-10 2011-08-11 Tyco Healthcare Group Lp Fluid Collection Canister Including Canister Top with Filter Membrane and Negative Pressure Wound Therapy Systems Including Same
US20100318043A1 (en) * 2009-06-10 2010-12-16 Tyco Healthcare Group Lp Negative Pressure Wound Therapy Systems Capable of Vacuum Measurement Independent of Orientation
US20100318071A1 (en) * 2009-06-10 2010-12-16 Tyco Healthcare Group Lp Fluid Collection Canister Including Canister Top with Filter Membrane and Negative Pressure Wound Therapy Systems Including Same
US20100324516A1 (en) * 2009-06-18 2010-12-23 Tyco Healthcare Group Lp Apparatus for Vacuum Bridging and/or Exudate Collection
US20110112490A1 (en) * 2009-07-14 2011-05-12 Vogel David C Releasably Sealable Wound Dressing for NPWT
US8444613B2 (en) * 2009-07-14 2013-05-21 Richard Vogel Pump leak monitor for negative pressure wound therapy
US20110015589A1 (en) * 2009-07-14 2011-01-20 Pal Svedman Disposable therapeutic device
US20110015590A1 (en) * 2009-07-14 2011-01-20 Pal Svedman Disposable therapeutic device
US20110015585A1 (en) * 2009-07-14 2011-01-20 Pal Svedman Method and device for providing intermittent negative pressure wound healing
US20110015619A1 (en) * 2009-07-16 2011-01-20 Pal Svedman Wound dressings for negative pressure therapy in deep wounds and method of using
EP2461863B1 (en) * 2009-08-05 2016-07-27 Covidien LP Surgical wound dressing incorporating connected hydrogel beads having an embedded electrode therein
DE102009039515A1 (en) * 2009-08-31 2011-03-03 Vcs Medical Technology Gmbh Vacuum therapy device
US20110112574A1 (en) * 2009-09-11 2011-05-12 Svedman Pal Paul Device for manual traction wound closure
JP5736383B2 (en) * 2009-10-23 2015-06-17 アミール ベルソン, Portability local oxygen therapy system
US20110106058A1 (en) * 2009-10-29 2011-05-05 Pal Svedman Adhesive Flange Attachment Reinforcer For Suction Port
US20110106027A1 (en) * 2009-11-05 2011-05-05 Tyco Healthcare Group Lp Chemically Coated Screen for Use with Hydrophobic Filters
JP2013515021A (en) * 2009-12-22 2013-05-02 リスホスピタレト,コペンハーゲン ユニバーシティ ホスピタル Wound care products
USD714433S1 (en) 2010-12-22 2014-09-30 Smith & Nephew, Inc. Suction adapter
US8066243B2 (en) * 2010-01-08 2011-11-29 Richard C. Vogel Adapter for portable negative pressure wound therapy device
US20110257611A1 (en) * 2010-04-16 2011-10-20 Kci Licensing, Inc. Systems, apparatuses, and methods for sizing a subcutaneous, reduced-pressure treatment device
GB201015656D0 (en) 2010-09-20 2010-10-27 Smith & Nephew Pressure control apparatus
FR2965180B1 (en) * 2010-09-27 2012-10-26 Apex Medical Corp pressure wound treatment system and negative retroaction control method therefor
FR2965181B1 (en) * 2010-09-27 2012-10-26 Apex Medical Corp Actuator for pressure wound treatment system negative
CA2814873C (en) * 2010-11-17 2018-04-24 Kci Licensing, Inc. Systems and methods for managing reduced pressure at a plurality of wound sites
DE102010052336A1 (en) * 2010-11-25 2012-05-31 Paul Hartmann Ag Wound dressing for the vacuum therapy
US9421132B2 (en) 2011-02-04 2016-08-23 University Of Massachusetts Negative pressure wound closure device
EP2670312A4 (en) 2011-02-04 2014-09-17 Univ Massachusetts Negative pressure wound closure device
WO2012123414A1 (en) * 2011-03-11 2012-09-20 Gunnar Loske Vacuum system and endoscopy arrangement for endoscopic vacuum therapy
US9302034B2 (en) 2011-04-04 2016-04-05 Smith & Nephew, Inc. Negative pressure wound therapy dressing
US9597484B2 (en) 2011-04-15 2017-03-21 University Of Massachusetts Surgical cavity drainage and closure system
US8979511B2 (en) 2011-05-05 2015-03-17 Eksigent Technologies, Llc Gel coupling diaphragm for electrokinetic delivery systems
DE102011075844A1 (en) 2011-05-13 2012-11-15 Paul Hartmann Ag Apparatus for providing vacuum to the vacuum treatment of wounds
JP2014516709A (en) 2011-05-24 2014-07-17 カリプト・メディカル・インコーポレイテッド Device with controller and pump module for providing a negative pressure for wound treatment
US9058634B2 (en) 2011-05-24 2015-06-16 Kalypto Medical, Inc. Method for providing a negative pressure wound therapy pump device
US9067003B2 (en) 2011-05-26 2015-06-30 Kalypto Medical, Inc. Method for providing negative pressure to a negative pressure wound therapy bandage
US9610388B2 (en) 2011-10-31 2017-04-04 Smith & Nephew, Inc. Apparatuses and methods for detecting leaks in a negative pressure wound therapy system
EP2782615B1 (en) * 2011-11-23 2016-10-19 KCI Licensing, Inc. Reduced-pressure systems, methods, and devices for simultaneously treating a plurality of tissue sites
EP2802366B1 (en) 2012-01-10 2015-08-19 KCI Licensing, Inc. Systems for delivering fluid to a wound therapy dressing
WO2013116158A3 (en) * 2012-02-02 2013-11-28 Kci Licensing, Inc. Systems and methods for delivering fluid to a wound therapy dressing
EP2626049A1 (en) * 2012-02-11 2013-08-14 Paul Hartmann AG Wound treatment device
US9901664B2 (en) 2012-03-20 2018-02-27 Smith & Nephew Plc Controlling operation of a reduced pressure therapy system based on dynamic duty cycle threshold determination
US9427505B2 (en) 2012-05-15 2016-08-30 Smith & Nephew Plc Negative pressure wound therapy apparatus
CA2874396A1 (en) 2012-05-22 2014-01-23 Smith & Nephew Plc Wound closure device
GB2502538B (en) * 2012-05-29 2014-10-22 Apex Medical Corp Negative pressure wound therapy system with a buffering unit
WO2014014922A1 (en) 2012-07-16 2014-01-23 Smith & Nephew, Inc. Negative pressure wound closure device
ES2625709T3 (en) * 2012-08-01 2017-07-20 Smith & Nephew Plc. Wound dressing
US20140171920A1 (en) * 2012-12-15 2014-06-19 Christopher Scott Smith Wound dressing apparatuses and methods thereof
WO2014193979A1 (en) * 2013-05-28 2014-12-04 Eksigent Technologies Llc Electrokinetic pumps
US20150094673A1 (en) * 2013-10-02 2015-04-02 Kci Licensing, Inc. Disposable reduced-pressure therapy system with electronic feedback
GB201317746D0 (en) 2013-10-08 2013-11-20 Smith & Nephew PH indicator
US20160325027A1 (en) * 2014-01-07 2016-11-10 Mayo Foundation For Medical Education And Research Enterocutaneous fistula treatment
WO2016184918A1 (en) * 2015-05-18 2016-11-24 Smith & Nephew Plc Heat-assisted pumping systems for use in negative pressure wound therapy
USD796735S1 (en) 2016-02-29 2017-09-05 Smith & Nephew Plc Mount apparatus for portable negative pressure apparatus
WO2018054834A1 (en) * 2016-09-20 2018-03-29 Medela Holding Ag Device for suctioning bodily fluids and for supplying a substance

Family Cites Families (156)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US679918A (en) 1900-08-17 1901-08-06 Splint Gate Bandage Company Shield for wounds.
US720812A (en) 1901-01-12 1903-02-17 Robert W Johnson Vaccination-shield.
US697637A (en) 1901-11-12 1902-04-15 John Ellwood Lee Shield for vaccinations, &c.
US843674A (en) 1906-06-20 1907-02-12 Edgar M Funk Massaging apparatus.
US1066934A (en) 1912-08-26 1913-07-08 Mary E Manney Surgical appliance.
US1251258A (en) 1917-08-07 1917-12-25 Harrison M Magill Emergency wound-closer.
US1385346A (en) 1919-06-27 1921-07-19 Taylor Walter Herbert Surgical wound-dam
US1355679A (en) 1920-04-28 1920-10-12 Mcconnell Thomas Vacuum apparatus
US2025492A (en) 1934-11-09 1935-12-24 Aird Andrew Wound drainage device
US2113253A (en) 1935-12-24 1938-04-05 Western Electric Co Therapeutic apparatus
US2122121A (en) 1937-02-02 1938-06-28 Tillotson Joseph Elmer Surgical aspirated drainage cup
US2195771A (en) 1937-11-09 1940-04-02 Estler Louis Edmond Surgical suction drainage cup
US2280915A (en) 1941-04-03 1942-04-28 John H Johnson Device for irrigating and treating wounds
US2385207A (en) 1943-06-03 1945-09-18 A D Morgan Hemostat
US2367690A (en) 1943-07-31 1945-01-23 Edgar H Purdy Wound protector
US2524750A (en) 1947-04-23 1950-10-10 Martin J Bellinger Surgical appliance for use with draining wounds
US2727678A (en) 1954-12-06 1955-12-20 Gomco Surgical Mfg Corp Suction pump
US3026874A (en) 1959-11-06 1962-03-27 Robert C Stevens Wound shield
US3042041A (en) 1960-03-09 1962-07-03 Mario E Jascalevich Device for draining wounds
US3042037A (en) 1960-06-16 1962-07-03 Nat Res Dev Dressing for wounds
US3288140A (en) 1963-10-04 1966-11-29 John J Mccarthy Means for treating surface wounds
US3367332A (en) 1965-08-27 1968-02-06 Gen Electric Product and process for establishing a sterile area of skin
US3398743A (en) 1965-10-20 1968-08-27 Shalit Shimon Closed system irrigating apparatus for viscus organs
US3397648A (en) 1967-04-17 1968-08-20 Gomco Surgical Mfg Corp Suction pump
US3486504A (en) 1967-11-20 1969-12-30 Lawthan M Austin Jr Device for applying dressing,medication and suction
DE1816838C3 (en) * 1968-01-12 1973-08-16 Svenska Utvecklings Ab Apparatus for washing persons, in particular patient-bettlaegerigen
US3568675A (en) 1968-08-30 1971-03-09 Clyde B Harvey Fistula and penetrating wound dressing
US3556096A (en) 1968-09-27 1971-01-19 Scholl Mfg Co Inc Cushioning and protective surgical bandage
US3616156A (en) 1969-02-25 1971-10-26 Scholl Mfg Co Inc Temporary mounting sheet for adhesive-surfaced articles
US3599639A (en) 1969-08-20 1971-08-17 Borg Warner Portable suction pump system
US3610238A (en) 1970-04-28 1971-10-05 Us Health Education & Welfare Wound infection prevention device
BE786485A (en) 1972-03-27 1973-01-19 Reick Franklin G surgical evacuateur
US3874387A (en) 1972-07-05 1975-04-01 Pasquale P Barbieri Valved hemostatic pressure cap
US3954105A (en) 1973-10-01 1976-05-04 Hollister Incorporated Drainage system for incisions or wounds in the body of an animal
USRE29319E (en) 1975-04-07 1977-07-26 Hollister Incorporated Drainage system for incisions or wounds in the body of an animal
US3933158A (en) 1974-02-15 1976-01-20 Haverstock Charles B Skin closure means
US4058123A (en) 1975-10-01 1977-11-15 International Paper Company Combined irrigator and evacuator for closed wounds
US4080970A (en) 1976-11-17 1978-03-28 Miller Thomas J Post-operative combination dressing and internal drain tube with external shield and tube connector
GB1549756A (en) 1977-03-10 1979-08-08 Everett W Wound irrigating device
US4180074A (en) 1977-03-15 1979-12-25 Fibra-Sonics, Inc. Device and method for applying precise irrigation, aspiration, medication, ultrasonic power and dwell time to biotissue for surgery and treatment
US4224945A (en) 1978-08-30 1980-09-30 Jonathan Cohen Inflatable expansible surgical pressure dressing
US4224941A (en) 1978-11-15 1980-09-30 Stivala Oscar G Hyperbaric treatment apparatus
GB2047543B (en) 1978-12-06 1983-04-20 Svedman Paul Device for treating tissues for example skin
US4250882A (en) 1979-01-26 1981-02-17 Medical Dynamics, Inc. Wound drainage device
US4261363A (en) 1979-11-09 1981-04-14 C. R. Bard, Inc. Retention clips for body fluid drains
US4399816A (en) 1980-03-17 1983-08-23 Spangler George M Wound protector with transparent cover
US4341208A (en) 1980-07-14 1982-07-27 Whitman Medical Corporation Moisture-retentive covering for ointment application
US4444548A (en) 1980-08-08 1984-04-24 University Testing Service Inc. Suction apparatus
US4385630A (en) * 1980-08-29 1983-05-31 Haemonetics Corporation Blood donation unit
US4468227A (en) 1981-05-29 1984-08-28 Hollister Incorporated Wound drainage device with resealable access cap
US4392858A (en) 1981-07-16 1983-07-12 Sherwood Medical Company Wound drainage device
US4465062A (en) 1982-05-14 1984-08-14 Gina Versaggi Noninvasive seal for a sucking chest wound
US4995400A (en) * 1982-08-27 1991-02-26 Boehringer Laboratories Pneumotach and components therefor
US4795435A (en) 1983-02-25 1989-01-03 E. R. Squibb & Sons, Inc. Device for protecting a wound
US4533352A (en) 1983-03-07 1985-08-06 Pmt Inc. Microsurgical flexible suction mat
US4778446A (en) 1983-07-14 1988-10-18 Squibb & Sons Inc Wound irrigation and/or drainage device
US4551141A (en) 1983-08-02 1985-11-05 Surgidyne Inc. Method and apparatus for removing liquids from a drainage device
US4553967A (en) 1983-10-14 1985-11-19 E. R. Squibb & Sons, Inc. Wound care and drainage system having hand access port
US4717382A (en) 1985-04-18 1988-01-05 Emergency Management Products, Inc. Noninvasive apparatus for treating a sucking chest wound
US4710165A (en) 1985-09-16 1987-12-01 Mcneil Charles B Wearable, variable rate suction/collection device
EP0242491A1 (en) 1986-04-24 1987-10-28 Genossenschaft VEBO Solothurnische Eingliederungsstätte für Behinderte Drainage device for wounds, and its use
US4641643A (en) 1986-04-28 1987-02-10 Greer Leland H Resealing skin bandage
US4743232A (en) 1986-10-06 1988-05-10 The Clinipad Corporation Package assembly for plastic film bandage
US5019059A (en) 1986-12-15 1991-05-28 Uresil Corporation Apparatus and method for collecting body fluids
GB8706116D0 (en) 1987-03-14 1987-04-15 Smith & Nephew Ass Adhesive dressings
EP0300621B1 (en) 1987-06-22 1990-12-27 Takeda Chemical Industries, Ltd. Suction equipment for medical operation
US4930997A (en) * 1987-08-19 1990-06-05 Bennett Alan N Portable medical suction device
JP2812756B2 (en) 1987-12-02 1998-10-22 スベッドマン,パル Bandages
US5176663A (en) 1987-12-02 1993-01-05 Pal Svedman Dressing having pad with compressibility limiting elements
US4925447A (en) 1988-06-22 1990-05-15 Rosenblatt/Ima Invention Enterprises Aspirator without partition wall for collection of bodily fluids including improved safety and efficiency elements
US5088483A (en) 1988-11-04 1992-02-18 Minnesota Mining And Manufacturing Co. Adhesive frame bandage
US5100396A (en) 1989-04-03 1992-03-31 Zamierowski David S Fluidic connection system and method
US5261893A (en) 1989-04-03 1993-11-16 Zamierowski David S Fastening system and method
US4969880A (en) 1989-04-03 1990-11-13 Zamierowski David S Wound dressing and treatment method
US5527293A (en) 1989-04-03 1996-06-18 Kinetic Concepts, Inc. Fastening system and method
US5106362A (en) 1989-04-13 1992-04-21 The Kendall Company Vented absorbent dressing
US5358494A (en) 1989-07-11 1994-10-25 Svedman Paul Irrigation dressing
WO1991000718A1 (en) 1989-07-11 1991-01-24 Svedman Paal Irrigation dressing
US4969881A (en) 1989-11-06 1990-11-13 Connecticut Artcraft Corp. Disposable hyperbaric oxygen dressing
US5014389A (en) 1989-11-15 1991-05-14 Concept Inc. Foot manipulated suction head and method for employing same
US5152757A (en) 1989-12-14 1992-10-06 Brigham And Women's Hospital System for diagnosis and treatment of wounds
US5161544A (en) 1990-03-14 1992-11-10 Johnson & Johnson Medical, Inc. Surgical drape having 360 degree fluid control
US5086763A (en) 1990-08-06 1992-02-11 Hathman Johnnie L Protective reclosable wound dressing
DE4034705A1 (en) 1990-10-31 1992-05-07 Martin Neumann wound closure
US5160315A (en) 1991-04-05 1992-11-03 Minnesota Mining And Manufacturing Company Combined adhesive strip and transparent dressing delivery system
US5149331A (en) 1991-05-03 1992-09-22 Ariel Ferdman Method and device for wound closure
US7198046B1 (en) 1991-11-14 2007-04-03 Wake Forest University Health Sciences Wound treatment employing reduced pressure
US5645081A (en) 1991-11-14 1997-07-08 Wake Forest University Method of treating tissue damage and apparatus for same
US5636643A (en) 1991-11-14 1997-06-10 Wake Forest University Wound treatment employing reduced pressure
US6436078B1 (en) * 1994-12-06 2002-08-20 Pal Svedman Transdermal perfusion of fluids
US5484399A (en) 1992-02-27 1996-01-16 Sloan-Kettering Institute For Cancer Research Process and device to reduce interstitial fluid pressure in tissue
US5244457A (en) 1992-03-23 1993-09-14 The Kendall Company Vented wound dressing
US5167613A (en) 1992-03-23 1992-12-01 The Kendall Company Composite vented wound dressing
US5380308A (en) * 1992-06-25 1995-01-10 Milieu Systems Corp. Containment vessels for liquid waste
GB9307312D0 (en) 1993-04-07 1993-06-02 United Surgical Services Ltd Surgical wound dressings
US5769801A (en) 1993-06-11 1998-06-23 Ndm Acquisition Corp. Medical pumping apparatus
US5447505A (en) 1993-08-04 1995-09-05 Merocel Corporation Wound treatment method
US5437651A (en) 1993-09-01 1995-08-01 Research Medical, Inc. Medical suction apparatus
US5480030A (en) 1993-12-15 1996-01-02 New West Products, Inc. Reusable, evacuable enclosure for storage of clothing and the like
US5549584A (en) 1994-02-14 1996-08-27 The Kendall Company Apparatus for removing fluid from a wound
US5701917A (en) 1994-03-30 1997-12-30 Khouri Biomedical Research, Inc. Method and apparatus for promoting soft tissue enlargement and wound healing
ES2208686T5 (en) 1994-07-26 2012-09-21 Convatec Technologies Inc. Ostomy appliance and wound drainage device
DE69528716T2 (en) 1994-08-22 2003-03-20 Kinetic Concepts Inc Canisters for wound drainage
DE4433450A1 (en) 1994-09-20 1996-03-21 Wim Dr Med Fleischmann An apparatus for sealing a wound area
DE19517699C2 (en) 1995-05-13 1999-11-04 Wilhelm Fleischmann A device for vacuum sealing a wound
US5840049A (en) 1995-09-07 1998-11-24 Kinetic Concepts, Inc. Medical pumping apparatus
US5562107A (en) 1995-09-27 1996-10-08 Hollister Incorporated Reclosable wound cover
GB9523253D0 (en) * 1995-11-14 1996-01-17 Mediscus Prod Ltd Portable wound treatment apparatus
US5848998A (en) 1996-07-11 1998-12-15 Marasco, Jr.; Patrick V. Tissue debriding apparatus
EP0938349B1 (en) 1996-10-22 2003-02-19 Coloplast A/S A paste
JP2985816B2 (en) * 1997-02-04 1999-12-06 日本電気株式会社 Liquid collecting apparatus
DE19722075C1 (en) 1997-05-27 1998-10-01 Wilhelm Dr Med Fleischmann Medication supply to open wounds
DE19727032A1 (en) 1997-06-25 1999-01-07 Hartmann Paul Ag plaster
NL1006457C2 (en) 1997-07-03 1999-01-05 Polymedics N V A drainage system to be applied to an open wound, hereby used element for placing a drainage tube or hose, and a method for using the drainage system.
US6135116A (en) 1997-07-28 2000-10-24 Kci Licensing, Inc. Therapeutic method for treating ulcers
GB9719520D0 (en) 1997-09-12 1997-11-19 Kci Medical Ltd Surgical drape and suction heads for wound treatment
US6071267A (en) 1998-02-06 2000-06-06 Kinetic Concepts, Inc. Medical patient fluid management interface system and method
US6095992A (en) 1998-04-06 2000-08-01 Augustine Medical, Inc. Wound treatment apparatus for normothermic treatment of wounds
US6458109B1 (en) * 1998-08-07 2002-10-01 Hill-Rom Services, Inc. Wound treatment apparatus
GB9822341D0 (en) * 1998-10-13 1998-12-09 Kci Medical Ltd Negative pressure therapy using wall suction
EP1168997B1 (en) 1999-04-02 2013-04-24 KCI Licensing, Inc. Vacuum assisted closure system with provision for introduction of agent
CN100402002C (en) 1999-04-02 2008-07-16 凯希特许有限公司 Vacuum assisted closure system with heating and cooling provision
US6695823B1 (en) * 1999-04-09 2004-02-24 Kci Licensing, Inc. Wound therapy device
GB9909301D0 (en) 1999-04-22 1999-06-16 Kci Medical Ltd Wound treatment apparatus employing reduced pressure
US6203563B1 (en) 1999-05-26 2001-03-20 Ernesto Ramos Fernandez Healing device applied to persistent wounds, fistulas, pancreatitis, varicose ulcers, and other medical or veterinary pathologies of a patient
US6116781A (en) 1999-08-13 2000-09-12 New West Products, Inc. Storage bag with one-way air valve
US6179804B1 (en) 1999-08-18 2001-01-30 Oxypatch, Llc Treatment apparatus for wounds
US6557704B1 (en) * 1999-09-08 2003-05-06 Kci Licensing, Inc. Arrangement for portable pumping unit
GB9926538D0 (en) 1999-11-09 2000-01-12 Kci Medical Ltd Multi-lumen connector
US6323386B1 (en) 1999-11-10 2001-11-27 Augustine Medical, Inc. Wound covering for a foot or hand
EP1977776B1 (en) * 1999-11-29 2016-02-10 KCI Medical Resources Wound treatment apparatus
US6764462B2 (en) * 2000-11-29 2004-07-20 Hill-Rom Services Inc. Wound treatment apparatus
GB0005211D0 (en) 2000-03-03 2000-04-26 Mediplus Ltd Apparatus for assisting wound healing
US6537033B2 (en) * 2000-04-11 2003-03-25 Western Dairies Incorporation Open loop control apparatus for vacuum controlled systems
GB0011202D0 (en) 2000-05-09 2000-06-28 Kci Licensing Inc Abdominal wound dressing
KR20030042441A (en) 2000-05-22 2003-05-28 아써 씨. 커피 Combination SIS and vacuum bandage and method
US6856821B2 (en) 2000-05-26 2005-02-15 Kci Licensing, Inc. System for combined transcutaneous blood gas monitoring and vacuum assisted wound closure
US6855135B2 (en) * 2000-11-29 2005-02-15 Hill-Rom Services, Inc. Vacuum therapy and cleansing dressing for wounds
US6685681B2 (en) * 2000-11-29 2004-02-03 Hill-Rom Services, Inc. Vacuum therapy and cleansing dressing for wounds
US7799004B2 (en) 2001-03-05 2010-09-21 Kci Licensing, Inc. Negative pressure wound treatment apparatus and infection identification system and method
EP1406567B1 (en) * 2001-07-12 2010-04-28 KCI Medical Resources Control of vacuum rate of change
GB0119811D0 (en) * 2001-08-14 2001-10-10 Adahan Carmeli A compact vacuum pump
US7004915B2 (en) * 2001-08-24 2006-02-28 Kci Licensing, Inc. Negative pressure assisted tissue treatment system
EP1450878A1 (en) * 2001-10-11 2004-09-01 Hill-Rom Services, Inc. Waste container for negative pressure therapy
US6648862B2 (en) * 2001-11-20 2003-11-18 Spheric Products, Ltd. Personally portable vacuum desiccator
US7195624B2 (en) * 2001-12-26 2007-03-27 Hill-Rom Services, Inc. Vented vacuum bandage with irrigation for wound healing and method
US20040002670A1 (en) * 2002-02-07 2004-01-01 Circle Prime Manufacturing, Inc. Wound care apparatus and methods
US20030219469A1 (en) 2002-02-11 2003-11-27 Kci Licensing, Inc. Environmental control device for tissue treatment
US6979324B2 (en) * 2002-09-13 2005-12-27 Neogen Technologies, Inc. Closed wound drainage system
US7815616B2 (en) * 2002-09-16 2010-10-19 Boehringer Technologies, L.P. Device for treating a wound
US7625362B2 (en) * 2003-09-16 2009-12-01 Boehringer Technologies, L.P. Apparatus and method for suction-assisted wound healing
GB0224986D0 (en) 2002-10-28 2002-12-04 Smith & Nephew Apparatus
US6998511B2 (en) * 2003-05-03 2006-02-14 George Medical Dressing and a method for applying the same
US7128735B2 (en) * 2004-01-02 2006-10-31 Richard Scott Weston Reduced pressure wound treatment appliance
US8137329B2 (en) * 2004-03-25 2012-03-20 Medindica-Pak, Inc. Method and apparatus for transforming a delivery container into a waste disposal system
CA2614794C (en) * 2005-07-24 2014-02-18 Carmeli Adahan Wound closure and drainage system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of EP1824533A4 *

Cited By (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7771374B2 (en) 2001-12-10 2010-08-10 Candela Corporation Method and apparatus for vacuum-assisted light-based treatments of the skin
EP2051675B2 (en) 2006-08-04 2018-04-18 KCI Medical Resources Wound-stimulating unit
EP3216481A1 (en) * 2006-09-19 2017-09-13 KCI Licensing, Inc. System for locating fluid leaks at a drape of a reduced pressure delivery system
JP2010504816A (en) * 2006-09-26 2010-02-18 ボリンジャー・テクノロジーズ・エル・ピー Pump system for negative pressure wound therapy
US9642955B2 (en) 2006-09-28 2017-05-09 Smith & Nephew, Inc. Portable wound therapy system
WO2008048481A3 (en) * 2006-10-13 2008-09-12 Bluesky Medical Group Inc Improved control circuit and apparatus for negative pressure wound treatment
US9636440B2 (en) 2006-10-13 2017-05-02 Bluesky Medical Group Inc. Control circuit and method for negative pressure wound treatment apparatus
EP2438935A1 (en) * 2006-10-13 2012-04-11 BlueSky Medical Group Incorporated Pressure control of a medical vacuum pump
US8308714B2 (en) 2006-10-13 2012-11-13 Bluesky Medical Group Inc. Control circuit and method for negative pressure wound treatment apparatus
US20100042074A1 (en) * 2006-10-17 2010-02-18 Richard Scott Weston Auxiliary powered negative pressure wound therapy apparatuses and methods
US8852170B2 (en) * 2006-10-17 2014-10-07 Bluesky Medical Group, Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
WO2008049029A3 (en) * 2006-10-17 2008-08-28 Bluesky Medical Group Inc Auxiliary powered negative pressure wound therapy apparatuses and methods
US20130018338A1 (en) * 2006-10-17 2013-01-17 Bluesky Medical Group, Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
US8323264B2 (en) 2006-10-17 2012-12-04 Bluesky Medical Group, Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
WO2008049029A2 (en) * 2006-10-17 2008-04-24 Bluesky Medical Group Inc. Auxiliary powered negative pressure wound therapy apparatuses and methods
EP2109472B1 (en) 2007-02-09 2015-08-19 KCI Licensing, Inc. System for managing reduced pressure at a tissue site
US8317774B2 (en) 2007-05-07 2012-11-27 Carmeli Adahan Suction system
EP2216057A2 (en) 2007-05-07 2010-08-11 Carmeli Adahan Suction system
US9050399B2 (en) 2007-07-02 2015-06-09 Smith & Nephew Plc Wound treatment apparatus with exudate volume reduction by heat
US9956327B2 (en) 2007-07-02 2018-05-01 Smith & Nephew Plc Wound treatment apparatus with exudate volume reduction by heat
WO2009004367A1 (en) 2007-07-02 2009-01-08 Smith & Nephew Plc Wound treatment apparatus with a control system connected to a flow meter and a pressure sensor
US9642951B2 (en) 2007-07-02 2017-05-09 Smith & Nephew Plc Silencer for vacuum system of a wound drainage apparatus
US8444392B2 (en) 2007-07-02 2013-05-21 Smith & Nephew Plc Pressure control
US8845603B2 (en) 2007-07-02 2014-09-30 Smith & Nephew Plc Silencer for vacuum system of a wound drainage apparatus
US8494349B2 (en) 2007-07-02 2013-07-23 Smith & Nephew Plc Measuring pressure
WO2009004288A3 (en) * 2007-07-02 2009-04-16 Smith & Nephew Pressure control
US8333744B2 (en) 2007-08-06 2012-12-18 Edward Hartwell Apparatus for the provision of topical negative pressure therapy
US8974429B2 (en) 2007-08-06 2015-03-10 Smith & Nephew Plc Apparatus and method for applying topical negative pressure
WO2009019420A1 (en) * 2007-08-06 2009-02-12 Smith & Nephew Plc Pump pressure control
US9878074B2 (en) 2007-08-06 2018-01-30 Smith & Nephew Plc Canister status determination
US8843327B2 (en) 2007-08-06 2014-09-23 Smith & Nephew Plc Canister status determination
WO2009040809A1 (en) * 2007-09-28 2009-04-02 Inolase 2002 Ltd. Vacuum assisted treatment of the skin
US8808274B2 (en) 2007-11-21 2014-08-19 Smith & Nephew Plc Wound dressing
US9956121B2 (en) 2007-11-21 2018-05-01 Smith & Nephew Plc Wound dressing
US8715256B2 (en) 2007-11-21 2014-05-06 Smith & Nephew Plc Vacuum assisted wound dressing
US9962474B2 (en) 2007-11-21 2018-05-08 Smith & Nephew Plc Vacuum assisted wound dressing
US8764732B2 (en) 2007-11-21 2014-07-01 Smith & Nephew Plc Wound dressing
US9844475B2 (en) 2007-11-21 2017-12-19 Smith & Nephew Plc Wound dressing
US20100286489A1 (en) * 2007-12-06 2010-11-11 Smith & Nephew Plc Apparatus and method for wound volume measurement
US9192332B2 (en) * 2007-12-06 2015-11-24 Smith & Nephew Apparatus and method for wound volume measurement
EP2237724B1 (en) 2007-12-06 2016-03-30 Smith & Nephew PLC Apparatus and method for wound volume measurement
US20160166740A1 (en) * 2007-12-06 2016-06-16 Smith & Nephew Plc Apparatus and method for wound volume measurement
JP2011508614A (en) * 2007-12-06 2011-03-17 スミス アンド ネフュー ピーエルシーSmith & Nephew Public Limited Company Apparatus and method for measuring wound volumes
WO2009071924A1 (en) * 2007-12-06 2009-06-11 Smith & Nephew Plc Apparatus and method for wound volume measurement
US8814841B2 (en) 2007-12-06 2014-08-26 Smith & Nephew Plc Apparatus and method for wound volume measurement
US9987402B2 (en) * 2007-12-06 2018-06-05 Smith & Nephew Plc Apparatus and method for wound volume measurement
US20150032031A1 (en) * 2007-12-06 2015-01-29 Smith & Nephew Plc Apparatus and method for wound volume measurement
US9801985B2 (en) 2007-12-06 2017-10-31 Smith & Nephew Plc Apparatus for topical negative pressure therapy
US9956329B2 (en) 2008-03-07 2018-05-01 Smith & Nephew, Inc. Wound dressing port and associated wound dressing
US8491548B2 (en) 2008-04-21 2013-07-23 Enzysurge Ltd. Liquid streaming devices and method of using such devices for treating wounds
US9044532B2 (en) 2008-04-21 2015-06-02 Enzysurge Ltd. Liquid streaming devices and method of using such devices for treating wounds
US8241260B2 (en) 2008-04-21 2012-08-14 Enzysurge Ltd. Liquid streaming devices for treating wounds, method of making such devices, and method of using such devices for treating wounds
US9642750B2 (en) 2009-12-22 2017-05-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9974695B2 (en) 2009-12-22 2018-05-22 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9808561B2 (en) 2010-04-27 2017-11-07 Smith & Nephew Plc Wound dressing and method of use
US9061095B2 (en) 2010-04-27 2015-06-23 Smith & Nephew Plc Wound dressing and method of use
US9956389B2 (en) 2010-12-22 2018-05-01 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9050398B2 (en) 2010-12-22 2015-06-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
WO2013049834A3 (en) * 2011-09-30 2013-05-30 Eksigent Technologies, Llc Electrokinetic pump based wound treatment system and methods
US9907703B2 (en) 2012-05-23 2018-03-06 Smith & Nephew Plc Apparatuses and methods for negative pressure wound therapy
EP3047793A1 (en) 2015-01-20 2016-07-27 ATMOS MedizinTechnik GmbH & Co. KG Wound dressing and use of a wound dressing

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EP1824533A2 (en) 2007-08-29 application
CA2585232A1 (en) 2006-05-18 application
US7981098B2 (en) 2011-07-19 grant
US20060025727A1 (en) 2006-02-02 application
US7625362B2 (en) 2009-12-01 grant
US20090012501A1 (en) 2009-01-08 application

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